move styles from bootstrap custom to chill entrypoint. split chillmain with imports sheets. clean styles

src/Bundle/ChillMainBundle/Resources/public/chill/index.js

@@ -14,12 +14,12 @@ global.select2 = select2;
 require('select2/dist/css/select2.css');
 require('select2-bootstrap-theme/dist/select2-bootstrap.css');
 
+
 /*
  * Load Chill themes assets
  */
 
 require('./chillmain.scss');
-require('./css/chillmain.css');
 
 import { chill } from './js/chill.js';
 global.chill = chill;
@@ -34,6 +34,7 @@ require('./img/favicon.ico');
 require('./img/logo-chill-sans-slogan_white.png');
 require('./img/logo-chill-outil-accompagnement_white.png');
 
+
 /*
  * Load local libs
  * Some libs are only used in a few pages, they are loaded on a case by case basis